128 lines
3.7 KiB
C++
128 lines
3.7 KiB
C++
#include "Server.hpp"
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#include <iostream>
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#include <cstdint>
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#include <cstring>
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#include <mpg123.h>
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#include <netdb.h>
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#include <stdexcept>
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#include <thread>
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#include <sys/socket.h>
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#include <vector>
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#include "packets/AudioPacket.hpp"
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#include "utils/audio.hpp"
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Server::Server() {
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this->channels = 0;
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this->encoding = 0;
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this->sampleRate = 0;
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// create a new mpg123 handle
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int error;
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this->mpgHandle = mpg123_new(nullptr, &error);
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if (this->mpgHandle == nullptr)
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throw std::runtime_error("[Server] Could not create a mpg123 handle.");
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// open the mp3 file
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// TODO(Faraphel): mp3 file as argument
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if (mpg123_open(
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this->mpgHandle,
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// "./assets/Caravan Palace - Wonderland.mp3"
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"./assets/Queen - Another One Bites the Dust.mp3"
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) != MPG123_OK)
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throw std::runtime_error("[Server] Could not open file.");
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// get the format of the file
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if (mpg123_getformat(
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this->mpgHandle,
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&this->sampleRate,
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&this->channels,
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&this->encoding
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) != MPG123_OK)
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throw std::runtime_error("[Server] Could not get the format of the file.");
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}
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Server::~Server() {
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// delete the mpg123 handle
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mpg123_close(this->mpgHandle);
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mpg123_delete(this->mpgHandle);
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}
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void Server::loop() const {
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// get the broadcast address
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addrinfo broadcastHints {};
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broadcastHints.ai_family = AF_INET6;
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broadcastHints.ai_socktype = SOCK_DGRAM;
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broadcastHints.ai_protocol = IPPROTO_UDP;
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// TODO(Faraphel): ip / port as argument
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addrinfo *broadcastInfo;
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if(const int error = getaddrinfo(
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"::1",
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"5650",
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&broadcastHints,
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&broadcastInfo
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) != 0)
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throw std::runtime_error("[Server] Could not get the address: " + std::string(gai_strerror(error)));
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const int broadcastSocket = socket(
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broadcastInfo->ai_family,
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broadcastInfo->ai_socktype,
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broadcastInfo->ai_protocol
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);
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if (broadcastSocket == -1)
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throw std::runtime_error("[Server] Could not create the socket: " + std::string(gai_strerror(errno)));
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// read the file
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AudioPacket audioPacket;
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std::size_t done;
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while (mpg123_read(
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this->mpgHandle,
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&audioPacket.content,
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std::size(audioPacket.content),
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&done
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) == MPG123_OK) {
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// set the target time
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// TODO(Faraphel): dynamically change this delay to be the lowest possible
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audioPacket.timePlay =
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std::chrono::high_resolution_clock::now() +
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std::chrono::milliseconds(5000);
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// set the audio settings
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audioPacket.channels = this->channels;
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audioPacket.sampleFormat = encoding_mpg123_to_PulseAudio(this->encoding);
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audioPacket.sampleRate = this->sampleRate;
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// set the size of the content
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audioPacket.contentSize = done;
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// broadcast the audio data
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if (sendto(
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broadcastSocket,
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&audioPacket,
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sizeof(audioPacket),
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0,
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broadcastInfo->ai_addr,
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broadcastInfo->ai_addrlen
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) == -1) {
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std::cerr << "[Server] Could not send audio packet: " << strerror(errno) << std::endl;
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continue;
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}
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std::cout << "[Server] Sent: " << done << " bytes" << std::endl;
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// TODO(Faraphel): should be extended to simulate live music streaming
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// wait for the duration of the audio chunk
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std::this_thread::sleep_for(std::chrono::milliseconds(static_cast<uint64_t>(
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(1 / static_cast<double>(this->sampleRate * this->channels * mpg123_encsize(this->encoding))) *
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1000 *
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static_cast<double>(done)
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)));
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}
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// free the server address
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freeaddrinfo(broadcastInfo);
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}
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